Brake mechanism.



L. A. HOERR.

BRAKE MECHANISM.

` APPLICATION FILED 0CT.2. IBIS. 1,156,479., I Patented 001.12, 1915.

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MM IIIIIIIIIIIIIIIII L. A. HOERR.

BRAKE MECHANISM.

APPLICATION FILED 0CT.2. 1913. 1,156,479. Patented (m12, 1915.

3 SHEETS-SHEET 2.

WITNESSES:

64 @5M WMM@ L` A. HOERR.

BRAKE MECHANISM.

APPLrcAnoN FILED ocr. 2. 1913.

Patented Oct. 12, 1915.

3 SHEETS-SHEET 3. 27

NY@ L] IN1/Enron Louis A. Hoerr.

Wl TN ESSE S:

`Louis A. nonna, or erreurs, Missorrnr;

' ,BRAKE 'ianoiiaivisivtf To all ytri/"tom #may concern Be it'lrnownfthat I, Louis A; Honra, a citizen of the United States of America, re-

' siding at the city fof St. Louis, tateof Missouri, have invented a certainnew and use-l ful Brake h/Iechanisimofwhich thefollowing is suclrarfull, clear, and exact description as will enable any one skilled in theart:

to which it appertains to inake'and usethe same, reterence rbeinghad to the accompanying drawings, `forming part of this specification.

nism for railway cars" and, more ,particulai-ly, to the ratchetand pawl for. the brake staff.

rllhe object of my' invention is to provide means for rigidly .connect-ing the ratchet taken on the line 2 2 of Fig. 1; Fig. 3 isa side elevation; Fig. l is a top plan viewk of.

Athe base plate; Fig. 5' is a view partly in section and partlyy in elevation, showing the manner of attaching the ratchet to and detaching it from the base plate; Fig is a bottom plan view of a portion of the 'ratchet wheel; Fig. 7 is a top plan view showing a slight modification; ll'ig. 8 isa sectionyztaken on the line 8 S of. F ig. 7; Fig. 9 is atop plan view showing another modification; Fig. 10 is a section taken on the line 10-10 of Fig. 9; Fig. 11 is a top plan view showing a further modification; and Fig. 12 isa section taken on the line 12-12 of Fig. 11.V

Likemarksy of reference refer to similarv parts in thev several views of the drawings.

15 represents a vbrake staff which is square in cross section. The bottom end of the brake stair 15 is secured in a suitable Stop 16, shown in Fig. 3, in the usual manner. Surrounding the brake stati 15 is a ratchet` wheel 17 which is provided with a square opening' 18, as shown in Fig. 6, corresponding in size and shape to the cross section of the brake staff 15. The ratchet wheel 17 is provided with a hub 18 which is adapted to project through an opening 19 in a base plate 20 which is secured to the car in any speciacatio'n of Letters Patent.

My invention relates to abralre mecha# Fig.

suitable manner. The hase plate 2O is provided' with screw threads 21 and the wheel 17; with corresponding threads 22. VThese to'each other as shown in Fig. 5.V IThe rat-@atea oet. 12,1915.

. Application lc'dctober 2, 1913. Serial-No. 792,919.

threads 22 are `formed only at the outer'end f of the hub 18 so that when the part-s are in their nornialposition, as shown in Fig.`2, the hub will turn freelyl in the opening inA the base plate 20. lt will be evidentffrom this construction that the wheel 2O can only be placed in position inthe plate or removed therefrom when the brake stafl' 15 is withdrawn from the wheel. Formed on the base f plate 20 is a boss adapted to receive a pawl 25 having a working end 26 engaging with the teeth of wheel 17 and a toe-piece 27 for releasing the pawl from the wheel. The pawl'Q is also provided with flange 28 which projects beneath the Vwheel 17 so as to limit the .upward movement of the pawl when the wheel 17 is in position. A bolt4 29 passes through the boss 2e' and is provided with .washers 30 and a nut/31. rIt

will be evident Vthat* even if this-bolt29 is entirely removed, theange 28 will hold the pawl in position so as to prevent its disengagement from the wheel. end 26, of the pawl 25 is made wider than the face oi the ratchet wheel 17, as shown in Injthis way', a certain amount of longitudinal movement is allowed between the ratchet and the pawl without reducingr the amount of'engaging surface between the two parts. Y

In Figs. 7 and 8, I have shown a slight modification in which the plate 20, instead of being provided with the thread 21, is provided with a flange 33 which is provided with openings 34, shown in dotted lines in Fig. 7. These openings 311 are adapted to The working allow the passage of lugs 35 formedV on the hub 1S in place of the teeth 22 hereinbefore described. The base plate :2O is also provided witha pair of fingers 36 which stand in. the position shown in the upper partof Fig. 7 before the parts are removed. After the parts are removed, however, these fingers 36 are bent into the position shown in the lower part of' Fig. 7, so as to prevent the return of kthe lugs 35 through the opening 34a In Figs. 9 and 10, have shown another i modification in which both the screw threads andthe iiange are omitted from theY base plate 20 and thehub 18 isprovided wit-h4v downwardly projecting lugsv 38 which are adapted to be bent into the position shown Y in dotted lines inFig. 10 after ythe parts are removed so as to prevent the hub. 18 from moving out of engagement with the plate20.

In Figs. 11 and 12,1 haveshown a stillv further modification in which the base plate is provided with a pail-.of flanges 40 and' 41j' respectively, which flangesV each extend half-way around the openingv 19 and are arranged in dierent planes. 'ln this construe tion, thehub 18 is provided with a flange 212 extending about half way around'thesanie.` In order to engage or disengage the wheel 17 Y' Afrom the pla-te 18 in this arrangement,v itis necessary to vturn the lug 42 to the side opposite the ange t() and then rotatethe i* wheel half a revolution and drop the ylug past the i'lange lil. t will be evident that v the wheel '17 cannoty be lifted out of the plate 20 without the lug 12 striking o-ver the iange'el() or the flange 41.V

VIt will be evident that in myy construction, theratchet wheel and pawl are rigidly secured together' by means ofthe Vbase plateV ypossible without reducing the effective en- OaOfinO surface between the two arts. bp a. Y

Y iiaving kully described my invention,

what l claim as new and desire to secure by Letters Patent of the United States is:

1'. Thecombination with a brake staff of a base plate having an opening through' which said stad passes, a ratchet wheel surrounding said stasaid ratchet wheel being ,providedv with a threaded hub adapted to project through said opening to prevent longitudinal movement. Y Y

' 2. The combination with a brake stati', of a base plate having an opening through "which )said stati' passes, said ratchet'wheel being provided with a threaded hub adapted to project through said opening and engage with the plate to prevent longitudinal movement, a pawl carried by ksaid base-plate land projecting beneath said ratchetV wheel, a flange carried by said pawl and projecting beneath said wheel to prevent movement of the pawl.

3. VThe Y combination with a brake of `a base plate having an opening through provided with a hub adapted to vproject through'said opening and havingrinclined longitudinal y threads to 'coperate with KVthe threads of said opening.

' 4. The combination with a brake staof a base plate having an opening through which said staff passes, said opening being provided with threads inclined to theV axis of the brakel staii', a ratchet wheel surrounding said stati, saidl ratchet being provided with a yhub havinginclined threads adapted to cooperate with the threads in said open` ing, a pawl carried by said base plate, and a :flange on said pawl progecting beneath said wheel toprevent longitudinal movement of said pawl. j f Y Y In testimony whereof, have'hereunto set my hand and axed my seal. Y Y' LOUIS A. HQERR. [Ls] vWitnesses: e W. A. ALEXANDER,

`GUM. SHORE.

`(ilopies of this patentrmay be obtained for ve cents each, by addressing the Commissioner of Patents, Washington, D., C. Y 

